The regression line, the line of best fit, is shown. It has a positive gradient.

The prediction interval is included. This is the distance between are two curved lines, one above the regression line and the other below. Both are closest to the regression line near the middle and get further away at each end.

Back to Sample size for a study of agreement between two methods of measurement.

This page maintained by Martin Bland.

Last updated: 12 January, 2004.